The short version
Medicare has a program that lets you pay $0 at the pharmacy and instead receive a monthly bill that spreads your medication costs across the rest of the calendar year. It’s called the Medicare Prescription Payment Plan (sometimes shortened to M3P).
It does not lower your total cost — you pay the same amount either way. What it does is replace a large, unpredictable pharmacy bill with a smaller, predictable monthly one.
Medicare Part D, briefly
If you have Medicare Part D (prescription drug coverage — stand-alone or bundled into Medicare Advantage), here’s what changed recently:
- In 2025, Medicare introduced a hard yearly out-of-pocket cap on Part D drugs. Once you hit the cap, every covered prescription for the rest of the year costs $0
- In 2026, the cap is $2,100
- The cap rises a little each year
Before this change there was no limit — some patients paid five figures a year. The cap is a major improvement, but it creates a new problem: what if you hit most of that $2,100 in January, all at once, at the pharmacy? The Medicare Prescription Payment Plan exists to solve that.
What the program does
When you’re enrolled:
- At the pharmacy, you pay $0 for your covered Part D medications
- Your Part D plan pays the pharmacy on your behalf
- Your Part D plan bills you monthly for what you would have paid, spread across the remaining months of the calendar year
Example. You take a blood thinner that would cost $550 at the pharmacy in January. Without the program, you pay $550 on January 5th. With the program, you pay $0 at the pharmacy and your plan bills you about $46 per month for the rest of the year. As other prescriptions fill through the year, the monthly bill recalculates.
Who benefits
This program is most useful if you spend more than about $2,100 per year out of pocket on Medicare-covered prescriptions — roughly the point where you’d hit the yearly cap and otherwise pay most of it up front.
Common medications that put patients in that range:
- Blood thinners (DOACs) — Eliquis, Xarelto, Pradaxa
- Cholesterol-lowering injectables (PCSK9 inhibitors) — Repatha, Praluent
- Diabetes medications — certain GLP-1s, insulins, and combination drugs
- Rheumatology biologics and JAK inhibitors taken at home — Humira, Enbrel, Rinvoq, Xeljanz, others
- Cancer and hematology oral medications
- Expensive inhalers for COPD or severe asthma
- Antivirals for hepatitis or HIV
If a single one of your medications has a copay over a few hundred dollars a month, you’re almost certainly a candidate.
What’s covered
All of your Medicare Part D prescriptions for the year — not one drug, not a short list. Every drug your Part D plan covers is in.
Not included:
- Part B drugs — medications given in a doctor’s office or infusion center (infliximab, Reclast, etc.) are billed under Part B, not Part D
- Over-the-counter medications
- Drugs your plan doesn’t cover (non-formulary)
- Medications paid for with cash, GoodRx, or manufacturer coupons outside your Part D plan
If a medication is on your Part D plan’s formulary and you normally pay a copay for it, it’s in.
How to enroll
Enroll by contacting your Part D plan directly — not Medicare, not the pharmacy, not your doctor’s office.
- Find the customer service number on the back of your Part D plan card (or on recent plan paperwork or the plan’s website)
- Tell them: “I’d like to enroll in the Medicare Prescription Payment Plan.”
- They are required by Medicare to offer it and to enroll you on request
- You can enroll any time during the year — enrolling at the start of the year gives you the longest runway
- New for 2026: once enrolled, it auto-renews each year unless you opt out
Enrollment usually takes effect within 24 hours (up to 10 days mid-month). Your plan will send written confirmation and billing details.
Things to know
- It does not lower your total cost — same total, spread across the calendar year
- You’ll get a monthly bill from your Part D plan. If you miss payments, the plan can remove you from the program. Your medications stay covered — you just go back to paying at the pharmacy
- If your drug costs are low (under a few hundred dollars a year), there’s nothing to smooth out and the program won’t help you
Frequently asked questions
Does this still count toward my $2,100 yearly cap? Yes. Every dollar billed under the program counts toward your Part D out-of-pocket cap exactly as it would at the pharmacy.
Can I opt out later? Yes, any time. It’s a billing option, not a contract.
Does this work with manufacturer copay cards or foundation grants? Manufacturer copay cards generally can’t be used with Part D plans at all. Foundation grants and Extra Help can sometimes layer differently under this program — call your Part D plan and ask specifically how it would interact with any assistance you already have.
What if I already hit my cap this year? Then there’s nothing left to pay out of pocket on Part D drugs this year, and the program won’t change anything until January.
Is this the same as Extra Help or LIS? No. Extra Help (the Low Income Subsidy) actually lowers your drug costs for people who qualify financially. This program doesn’t lower costs — it only spreads them out. Many patients benefit from both.
The official Medicare page
Everything above is summarized from Medicare’s own materials. You (or a family member) can verify it directly:
medicare.gov/prescription-payment-plan
That page includes a short worksheet that helps estimate whether the program would benefit you based on your current prescriptions.
The bottom line
If you take medications that cost you real money, the Medicare Prescription Payment Plan should probably be part of your 2026 plan. One phone call to your Part D plan. Every Part D drug you take, for the whole year. Bring it up at your next visit if you’d like help thinking through whether it fits.
This handout is provided for educational purposes and does not replace individualized medical advice or guidance from your Part D plan. Program details are accurate as of 2026 and may change in future years.